Gas-engine.



No. 877,758. PATENTED JAN. 28, 1908.,

W; H. ASH.

GAS ENGINE.

APPLICATION FILED APR.5. 1906.

3 SHBETS-SHEET 1.

Attest In ventor:

W/Lufl/n HQ flSH by MWM Atti a No. 877,753. 'PATENTED JAN. 28, 1908. W. H. ASH.

GAS ENGINE.

APPLICATION FILED APR.5, 1906.

v In ventm'i W/Lu/m l H HSH 3 SHEETS-SHEET 2.

No. 877,753. PATENTED JAN. 28, 1908.

w. H. ASH.

GAS ENGINE.

APPLICATION FILED APR.5, 1906.

3 SHEETS-SHEET 3.

V f Y/ Attest: In ventor:

I7V/LL/HIV7 H. 195/7 475% MW byjm 4% -WILLIAM H. ASH, OF BAY SHORE, NEW YORK.

GAS-E N GINE.

Specification of Letters Patent.

Patented Jan. 28, 1908.

Application filed April 5. 1906- Serial No. 310155.

To all whom it may concern.

Be it known that I. WVILLIAM H. Asn, a citizen of the Uniti '1 States of America. residing at Bay Shore, in the county of Sufi'olk, State of New York, have invented certain new and useful Improvements in Gas- Engines, of which the following is a specification. I

It is the main object of my invention to provide mechanism whereby an explosion or gas engine of a common type or a nonrcversible engine especially constructed with the improvements herein shown, may be readily changed from two to four cycle at the will of the operator.

Other objects of my invention, such as theconstruction of the peculiar form of carbureter necessary, and the utilization of the residual air and gases after the explosion while the engine is run at four cycle will be obvious from the description as hereinafter set forth.

In the accompanying drawings Figure 1 is a diagrammatic plan view of a preferred form of gas engine with'my improvements applied thereto; Fig. 2 is a vertical section j 01 an engine showing the arrangement of the ports and lubricatmg svstom Fig.

3 is a sectional view of a preferred'form of carbureter; and Figs. 4, 5, and 6 are views of modifications.

Referring tov the drawings, Figs. 1- and 2, 10 represents the cylinder" with crank case 14 having bearings for a crank, a shaft 11 with a balance. wheel 12. shaft 11 is connected to the piston 13 by the rod 13 The cylinder is provided withan exhaust port 101 on one side, and an inlet port 102 from the crank chamber on the opposite side. At the end of the explosion stroke the burned gases exhaust direct into the atmosphere and the fresh charge which has been compressed meanwhile in the crank chamber immediately rushes in as soon as the port 102 is opened. A suitable deflector 133 may be placed on the upper side of the piston head to direct the gas to the upper part of the cylinder.

On .the shaft 11 two gears 15, 16,- are provided adapted at all times to engage and rotate gears 17 and 18 respectively, on se arate shafts 19, 20. The gear 17 meshes with the gear 15 in the proportion of two to one, while the gears 18 and 16 are equal. Both gears 17 and 18 are elongated sufficiently to permit lateral movement for the "purpose produced thereby. The crank of the about to be described, without disengagement of the gears.

()n the shafts 19, 20, are grooved collars 21 and 22 respectively, engaged by the forked ends of a shifting rod 23 provided with a suitable handle or other operating means 24.

Also on these shafts-are circuit closers 25,

26,one (25) adapted to contact with the terminal 27 of the sparking circuit and the other (26) to contact with the terminal 28 according as the engine is to run four or two cycle, as hereinafter described. Either cam 29 or cam 30- at the adjacent ends of the shafts 19 and 20 may be brought into position to engage and operate a roller 31 on the pivoted arm 32 on the casing of the carburetor 33. A cam 34 is also placed on the shaft 19 for engaging suitable lever mechanism 42 for'operating an exhaust valve in port 35 on top of the cylinder, when the engine is running four cycle, as will be described later.

From this description it will be readily seen that the engine when in the position shown will operate as a two-cycle engine, the shafts 11. and 20 through the gears 16 and 18 will cause the carburetor valve by means of the cam 30 to be opened at each revolution, and the chargeto be ignited at each revolution by the closing-of the sparking circuit. Although the gear 17 revolves during the same period, the circuit closer 25 and cams 29 and 34 are out of action, and no effect is By shifting the rod 23 to the right, the shafts 19 and 20 will move with all the attached parts correspondingly.

The circuit closer 25 will then contact with the terminal 27 and the cam 29 engage the roller 31, but as this shaft turns only half as fast as the shaft 20 the carbureter valve will be operated once at every other revolution, or at four cycle, and the circuit closer 25 will also complete the circuit to the spark plug at every other revolution. After'shifting the shafts the cam 30 and circuit closer 26 will be out of engagement with the roller 31 and terminal 28.

When the mechanism is adjusted to run 4-cycle, the cam 34' will act on the lever mechanism 42 (Fig. 1) to open theexhaust valve (Fig. 2) at the proper time.

My preferred form of carburetor valve (Fig. 3), consists of a casing 33 having a pivoted rod 32with roller 31 adapted to be engaged at the end by-a cam 30, or 29, as.

previously described and 'shownin-Fig. 1.

Within this casing is a valve 60'With a'v alve seat and a stem 61 passing through astufling box' 62in the top of the casing. This stem.

61 is provided with'a vertical slot 61 to per and the rod 32 in the upper part of the slot 61. This spring may be either on the upper or lower sideofj the to of the casing (Figs. 3

and 4).. .Aneedle va ve 65 of any suitable style supplies the explosive liquid, which isvaporized on the inrush of air on lifting the valve, due to the vacuum in the crank chamher. The mixture then passes through the passage; 66 to the crank chamber of the engine. From this construction it will be seen 'that'it is impossible to reverse the engiine, for should the cam for any reason turn in-a direction opposite to. the arrow, the rod 32 will be raised instead of depressed and itsopposite end will move freely in the slot 61 compressing the'spring and closing the valve tighter, thereby positively preventing a fr'eshcharge entering the crank chamber.

The modification shown in Fig. 5 shows a carbureter valvebf similar construction, but the cam engages the end of the rod that raises the valve from its seat in such a man'- I ner that the engine maybe reversed if desired. By similarly placing the cam (Fig. 3)

sired. A

Fig. 6 shows a gravity valve which is opened by the vacuum" caused inthe crank chamber when the engine is running eithen The stem to this valve is of course With any one of these carbureter valves the cam 30, or cam 29, is so placed on the shaft that the valve-is not opened until-the iston is at thetop of the stroke and. has orced all the air out of the cylinder. When the iston is up a vacuum. is created in the I crani chamber, and the proper amount of air rushes in as soon as the valve is opened. r I claim as my invention: I

1. A gas engine comprising a cylinder and piston, a driving shaft, an exhaust port 0 ened by the piston at the endof the exp osion stroke in combination with a carbureter for supplying gas to the cylinder, a sparkingcircuit to explodev the gas in the cylinder, and means for operating said oarbureter and sparking circuit either at every or every other revolution of the crank shaft forthe piston.

"2. A gas engine comprising a, cylinder and piston, an exhaust port opened by the piston at the end of the explosion stroke, in combination with a carbureter and sparking airedit, two shafts driven from the engine, one

' at half the speed of the other, and-means for the end of the explosion stroke, a driving operating the carbureter and sparking circuit from either of said shafts, whereby the engine may be run at two cycle or four cycle. 3. Agas engine comprising a cylinder and piston, an exhaust port opened by the-piston at the end of the explosion stroke, in com-: bination with .a carbureter and sparking cirj cuit and two shafts driven from the engine, each shaft having a cam to, operate the carbureter and a circuit closer to operate the sparking circuit, whereby the engine may be run at two cycle or fourc cle.

' 4. A gas engine comprisnig a cylinder and piston, an exhaust port opened by the piston at the end of the explosion stroke, a driving shaft, gears onsaid shaft, a carbureter for supplying gas to the'engineand a sparking circuit to explode the same, in'combination with means operatively connected with said gears for operating said carbureter and sparking circuit either at every or every other revolution ofthe crank shaft forthe iston.

- 5. "A gas engine comprising a cylin er and piston, an exhaust opened by the piston at shaft, gears on said shaft, and a carbureter l for sup lying gas to the engine in combination wit means comprising two independent shafts, gears thereon meshing with said first gears, and cams, means adapted to be en- .gaged by the cams for operating the -car' the same object may be accomplishedif de bureter valve, and means for shiftingthe shafts for running the engine two cycle or four cycle. i

- 6. A gasengine comprising a cylinderand piston, an exhaust opened bythe piston at the end of the explosion stroke, a" driving shaftand two gears on said shaft, in combination with means com rising-twoother shafts, a'gear on each sha t meshing with a 1.05 gear on the driving" shaft 'andmeans for o eratively connecting these gears whereby t e engine is run two cycle or four cycle, one L- pair of gears being in the. proportion of two to one and the other pairebemg equal.

-7 A gas engine comprising a cylinder and piston, an exhaust opened by .the piston at the end of'the explosion stroke, in combina tion with an outlet valve at the outer end of the cylinder and means for admitting an explosive charge to said cylinder and means for exploding the same on either every or every other revolution of the crank shaft of the piston. v

8. A gas engine comprising a cylinder and piston, a driving shaft and a carbureter, in combination with means for keeping the carbureter valve closed on a reversal of the engine. I Y Y 9. A gas enginecornprising a cylinder and piston, a driving shaft and a carbureter, in

with, a rod working in the slot of said spin die and means for operating said rod to actu- 13( ate the spindle only on the forward drive of the engine.

10. A gas engine comprising acylinder and piston, a driving shaft and a carburetor, in combination with a carbureter valve, a slotted spindle operating in connection therewith, a rod working in the slot of said spindle and means for operating sai'd rod on the reversal of the engine to insure the continual closure of the valve. 11. A gas engine'comprising a cylinder and piston, a driving shaft and a carbureter, in combination with a carbureter valve, a

slotted spindle operating in connection therewith, a rod working in the slot of said spindle and a cam operating from the driving mech-' 'ranlsm oi the engine to actuate said rod so as In testimony whereof I have signed my name to this Specification, in the presence of two subscribing w tnesses.

WILLIAM H. ASH.

Witnesses:

MADGE EJKEIR, EDNA COLLINS, 

